Need to remove old gas from tank

My wife’s uncle passed away last December. His 2004 tundra has been sitting in the driveway ever since. His wife wants to give the truck to my son who is turning 16. There’s about a third of a tank and I’m sure that gas has gone bad. How can I get it out? Can I siphon out through the filler neck? Or other method?

 

I’m no expert, but less than a year, I’d get some Star Brite from Star tron, and give it a strong dose, then add new gas (also with more Star Brite), to fill it. Then start it. If the gas is bad, odds are it's bad in the fuel lines etc., so nothing to lose.

Others here may have better suggestions, or call a mechanic.

 

I agree here. If it's only been last December, put some fresh in it and run it.

 

Run it with some fresh gas and some heet or water treatment added. Space in the tank allows for condensation.

 

You are fine. I've run cars plenty of times with tanks of 2-3 year old gas. I wouldn't even think twice about running last year's gas.

If you are really worried, dump some fuel treatment of your choice in it and top it off with fresh high octane.

But you won't really need any of that. The battery is the most likely thing to actually have gone bad sitting for a year.

 

Remove the fuel line in the engine bay and remove the fuel pump relay. Look up the relay pinout and ground the negative to the truck body and give power to the correct pin to run the fuel pump.

 

Yeah, I tried this when I had to drop my fuel tank, but quickly discovered the actual volume of fuel pumped to be TINY....and realized it would take forever to drain the tank like this.

Which I should have realized if I had thought about the fact that pump is made to pump at high pressure, but in use, will take HOURS to empty the tank, and being a gear pump, rather than a centrifugal pump, the lack of back pressure doesn't actually effect volume pumped.

 

If you really want to get it out, a little faster.

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